Answer:
C. 7x + 45
Step-by-step explanation:
To start answering this question, let's first distribute the 6 * ( x + 7 ) so that we can add like terms to simplify.
So let's multiply the 6 out to the ( x + 7 ) to get ( 6x + 42 ).
Now the complete expression reads: 6x + 42 + ( x + 3 )
With this, we can add all the like terms( 6x and x, and 42 and 3) together.
So we end up with 6x + x + 42 + 3 = 7x + 45
So the correct answer is C. 7x + 45
